Substitution Cipher Puzzle

Encrypted text

GS QMS AES GKMJU GS QMS AES REOJUMSX

Encrypted text

GST'Z KZSE DLYALNATF CSYG ST ZS ZCWZ MLLYATF

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CJVVS NXPV TITZTPT

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BFVG DG OEDG LENSBUX UEFRC

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LDTD PSADQ FLD QBO

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TAXL M XJMPP LNSG REWP PECEGR EG M PNGZPI SNWPQ